27/10/2021
Development...
These tiny jelly drops are the eggs of a Reticulated glassfrog (Hyalinobatrachium valerioi). Every day the embryos change a bit in shape and color.
The female leaves the breeding site soon after the eggs are fertilized. After fertilization, the male guards the eggs both at night and during the day. Other males that approach the eggs are aggressively attacked. Males continue to call, attracting more females, and have been observed to guard up to as many as seven clutches on the underside of a single leaf.
Their call is what made us found them. During nightwalks along small riverstreams in Costa Rica, the call could be heard loud and clear. This cluster was interesting for a picture because it was one of the only ones that contained organisms that were recognisable as embryos. Many were not yet developed in the shape of typical embryos.
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Cheers Jasper.